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PT Set 1
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1.
A common application of an aluminum block containing quench cracks is to:
2.
Which of the following is NOT an advantage of a water washable fluorescent penetrant process?
3.
When using a water washable penetrant testing process, why should the water rinse temperature remain constant?
4.
What is the proper technique for removal of excess penetrant from a part when using a water washable penetrant process?
5.
Which type of developer would you use to obtain the highest sensitivity test results?
6.
What type of penetrant process would be best suited to an application at near freezing temperatures?
7.
Which type of developer does NOT provide a contrasting background against which to view penetrant indications?
8.
Which type of developer should NOT be used with a visible dye penetrant process?
9.
Why might steel parts have a greater tendency towards rusting after penetrant testing?
10.
The most significant advantage of the visible solvent removable penetrant process is?
11.
Indications which are caused by design or construction of the test piece are called?
12.
Which penetrant test processes commonly use the same penetrants?
13.
Mercury vapour black lights may be extinguished if the supply voltage drops below about:
14.
The output of a mercury vapour black light depends on:
15.
When a mercury vapour black light is first turned on, what minimum warm-up time is normally required?
16.
When a mercury vapour black light is inadvertently cut off, approximately how long should it be allowed to cool before attempting to restart?
17.
A soft aluminum test piece previously sand-blasted to remove tightly adhering soils. What additional surface preparation should be performed?
18.
Dried, non-aqueous developers are best removed after penetrant testing by:
19.
The most important penetrant test processing time to control is:
20.
A penetrant which contains an emulsifier is called:
21.
A penetrant which requires a separate emulsification step prior to removal from the surface of the test piece is called?
22.
The chief advantage of using a water washable penetrant process is:
23.
While performing a fluorescent water washable penetrant test, which of the following steps should be performed under black light?
24.
What are the two most important properties in determining the penetrating ability of a penetrant?
25.
The human eye is most sensitive to which of the following types of light?
26.
What amount of time is normally considered necessary for dark adaption of the eyes prior to performing a fluorescent penetrant test?
27.
Which of the following is NOT normally recommended?
28.
What is the most common source of penetrant bath contamination?
29.
Which of the following is normally considered acceptable practice?
30.
A penetrant testing method in which an emulsifier, separate from the penetrant, is used is called:
31.
A penetrant testing method in which the degree of washability can be controlled by the operator is called:
32.
Open, shallow discontinuities are best detected by which penetrant testing method?
33.
An advantage of the post emulsifiable penetrant testing process is that:
34.
A disadvantage of the post emulsifiable penetrant process is that:
35.
Acceptable methods to apply emulsifier are:
36.
An advantage of emulsifier application by dipping is:
37.
Emulsification time is less critical for the detection of:
38.
Over washing during excess penetrant removal is less likely with which penetrant testing process?
39.
The fluorescent dyes used in the liquid penetrant testing process are most active when energized with black light of what wavelengths? (Å = angstrom)
40.
Application of penetrant to a test piece may be by:
41.
The most likely result of a too short dwell time of an emulsifier is:
42.
Diffusion of a lipophilic emulsifier penetrant into the test piece surface is stopped by:
43.
When using a post emulsifiable penetrant process, it is important to drain as much excess penetrant from the surface because:
Too much penetrant on the part surface may lead to more rapid penetration and over-sensitivity
A thinner layer of penetrant is likely to have higher capillary action and be more sensitive to fine discontinuities
A thinner layer of penetrant will result in less penetrant contamination in the emulsifier tank
None of the above
44.
When a drain-dwell technique is used during emulsification, what two mechanisms are responsible for combining the emulsifier and penetrant?
45.
During post-emulsifiable testing, the test piece does not rinse acceptably clean. What should be done?
46.
The adequacy of excess penetrant removal, using a water washable process, is judged and controlled by:
47.
Another name for a self-emulsifying penetrant process is:
48.
Which of the following is a function of an emulsifier?
49.
When viewed under black light, developer appears:
50.
Penetrant developers are used in which of the following forms?
51.
Which of the following developers requires the test piece to be dried prior to its application?
52.
An effect of a thick developer coating might be:
53.
Why is it important to view the test piece shortly after developer application and periodically through development time?
54.
Which of the following is an advantage of a dry developer?
55.
Why is the need for a dry surface prior to developer application more of a disadvantage with a dry developer than with a non-aqueous wet developer?
Because the dry developer only forms a thin film on the surface of the test piece
Because the solvent in a non-aqueous wet developer penetrates deeper into discontinuities to contact entrapped penetrant and draw it back out
Because the warm test piece causes evaporation of the solvent in the non-aqueous developer
All of the above
56.
The preferred method of application of aqueous wet developer is:
57.
It is easier to control developer coating thickness with a soluble developer than a water suspendable one because:
58.
Which of the following is NOT an advantage of an aqueous wet developer?
59.
A disadvantage of water-soluble developers is:
60.
Fluorescent penetrant indications are more visible than colour contrast penetrant indications because:
61.
During fluorescent water-washable PT on a turbine blade, after rinse the entire surface still glows pale green under UV. The MOST LIKELY cause is:
62.
You arrive on site for a PT inspection on a stainless-steel weldment. The supplied penetrant kit shows >0.001% by weight chloride content. The correct action is:
63.
On an aluminium quench-crack reference block, your new penetrant batch shows 50% fewer indications than the previous validated batch. You should:
64.
UV-A meter reads 950 µW/cm² at 15 inches from the lamp face. Per ASTM E165 / ASME V, this is:
65.
During PT of a forging at 8°C ambient, indications appear faint and slow to develop. The MOST APPROPRIATE corrective action is:
66.
A technician reports a long, broad bleed-out indication along a machined fillet. Cross-checking shows it follows a sharp tool-mark profile. This is BEST classified as:
67.
After applying non-aqueous wet developer, the developer dries unevenly and pools in low areas. The MOST LIKELY remedy is:
68.
During inspection of a high-strength low-alloy weld, an indication is observed that develops rapidly to a length of 6 mm with sharp, defined edges following the toe of the weld. Most experienced inspectors would call this:
69.
Per ASME Section V Article 6, after solvent removal of excess penetrant, the dwell time for the developer (during which indications must form) is normally:
70.
Your post-emulsifiable test is showing inadequate sensitivity. Penetrant dwell, emulsifier dwell and developer are within procedure. The MOST LIKELY remaining cause is:
71.
Comparing visible solvent-removable to fluorescent water-washable on the same crack panel, fluorescent is preferred because:
72.
During a re-test of a part previously failed for cracking, you must:
73.
You see a bleed-out that initially appears as a tight line but, on second viewing 5 minutes later, has spread into a broad fuzzy area. This is BEST interpreted as:
75.
Your inspection booth white-light measurement at the surface reads 18 lx during a fluorescent PT. Per ASME V / ASTM E165 you should:
76.
A black-light reading taken without the filter installed is:
77.
During hydrophilic emulsifier use, scrubbing action is achieved by:
78.
If a penetrant indication that initially appears at the toe of a weld disappears after a second rinse and re-development:
79.
Maximum penetrant dwell time before processing per ASME V Article 6 is normally:
80.
A welder requests retesting after grinding out an indication. The minimum re-PT acceptance step is: